Treating pregnant mothers, and then their infants, with select strains of probiotics – bacteria present naturally in the body and sometimes added to food or dietary supplements to boost immune function – may help prevent a skin condition known as eczema in children with a family history of allergies, particularly during the first 3 months of life, Dutch researchers report.

Where to get it: Dried yeast is a top source of niacin, but for something more appetizing, try peanuts or peanut butter; one cup of raw peanuts contains 17.6 mg , more than 100{d4bb9b603273d3db628ee003d8be004fd367b218b0401eceee80736bd71245b4} of your DV. Beef and chicken liver are particularly niacin-rich, as well.

In those who are otherwise healthy, there is little evidence that supplements have any benefits with respect to cancer or heart disease 2 22 Vitamin A and E supplements not only provide no health benefits for generally healthy individuals, but they may increase mortality, though the two large studies that support this conclusion included smokers for whom it was already known that beta-carotene supplements can be harmful.

Where to get it: As with riboflavin, dried yeast is the best food source for thiamin, containing 11 mg per 100-gram serving However, you may find it easier to get your fill of thiamin with runners-up pine nuts ( 1.2 mg per serving ) and soybeans ( 1.1 mg ).